collect2 or AIX ld?

[Doug Semler <doug at seaspace dot com>]

Is collect2 broken or is AIX's ld brain dead?

I was under the impression that if a library contains symbols that are
unused, the linker did not attempt to load it.  I have a library which
contains c++ code which is linked against all our code in case the
programs use the functions.  However, I get this when I try to link:

(libmessage is the culprit)

aix1:~/foo> gcc -DHP800 -DAIX -D_IBM_RS6000 -O -I.  \
-I/vol/scm/repository/source/include  \
-I/vol/scm/repository/source/include/message \
-I/vol/Zinc/include \
-I/vol/scm/repository/source/include/ZafUtils \
-O -o sccs2rcs sccs2rcs.o \
-L/vol/scm/dev/lib/AIX \
-lpass -lapp -lnumrec -letmeta -letx -lcdf -luif -lutils -lmessage -lm -v
Reading specs from /opt/egcs/lib/gcc-lib/powerpc-ibm-aix4.2.0.0/egcs-2.90.27/specs
gcc version egcs-2.90.27 980315 (egcs-1.0.2 release)
 /opt/egcs/lib/gcc-lib/powerpc-ibm-aix4.2.0.0/egcs-2.90.27/ld -bpT:0x10000000 -bpD:0x20000000 -btextro -bnodelcsect -o sccs2rcs /lib/crt0.o -L/vol/scm/dev/lib/AIX -L/opt/egcs/lib/gcc-lib/powerpc-ibm-aix4.2.0.0/egcs-2.90.27 -L/opt/egcs/powerpc-ibm-aix4.2.0.0/lib -L/opt/egcs/lib sccs2rcs.o -lpass -lapp -lnumrec -letmeta -letx -lcdf -luif -lutils -lmessage -lm /opt/egcs/lib/gcc-lib/powerpc-ibm-aix4.2.0.0/egcs-2.90.27/libgcc.a -lc /opt/egcs/lib/gcc-lib/powerpc-ibm-aix4.2.0.0/egcs-2.90.27/libgcc.a
ld: 0711-317 ERROR: Undefined symbol: streambuf::uflow(void)
ld: 0711-317 ERROR: Undefined symbol: streambuf::pbackfail(int)
ld: 0711-317 ERROR: Undefined symbol: streambuf::xsputn(char const *, int)
ld: 0711-317 ERROR: Undefined symbol: streambuf::xsgetn(char *, int)
ld: 0711-317 ERROR: Undefined symbol: streambuf::seekoff(long, ios::seek_dir, int)
ld: 0711-317 ERROR: Undefined symbol: streambuf::seekpos(long, int)
ld: 0711-317 ERROR: Undefined symbol: streambuf::sys_read(char *, int)
ld: 0711-317 ERROR: Undefined symbol: streambuf::sys_write(char const *, int)
ld: 0711-317 ERROR: Undefined symbol: streambuf::sys_seek(long, ios::seek_dir)
ld: 0711-317 ERROR: Undefined symbol: streambuf::sys_close(void)
ld: 0711-317 ERROR: Undefined symbol: streambuf::sys_stat(void *)
ld: 0711-317 ERROR: Undefined symbol: cerr
ld: 0711-317 ERROR: Undefined symbol: .ostream::operator<<(char const *)
ld: 0711-317 ERROR: Undefined symbol: ._IO_free_backup_area
ld: 0711-317 ERROR: Undefined symbol: .streambuf::setb(char *, char *, int)
ld: 0711-317 ERROR: Undefined symbol: .ostream::operator<<(int)
ld: 0711-317 ERROR: Undefined symbol: hex(ios &) 
ld: 0711-317 ERROR: Undefined symbol: .ostream::operator<<(unsigned int)
ld: 0711-317 ERROR: Undefined symbol: dec(ios &) 
ld: 0711-317 ERROR: Undefined symbol: ._IO_putc
ld: 0711-317 ERROR: Undefined symbol: .streambuf::~streambuf(void)
ld: 0711-317 ERROR: Undefined symbol: .streambuf::streambuf(int)
ld: 0711-317 ERROR: Undefined symbol: .streambuf type_info function
ld: 0711-317 ERROR: Undefined symbol: streambuf type_info node
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.
collect2: ld returned 8 exit status

when I add libstdc++ to the link path, it links fine, but when I do an nm
on the executable, I found that the streambuf code is linked in.  The
executable is 200K stripped.

When I remove libmessage from the link path, it links fine, and the
stripped executable is only 7K.  Since we have upwards of 400 individual
programs we make, we cannot have the overhead associated with including
libstdc++.  Note the problem seems to occur with c++ libraries.  Regular
C libraries do not affect exectable size.

Before you say: "Solution: only include libmessage on those executables
which need it", this is not an option...the generalized makefiles we
use would require to much work to allow this.

TIA - Doug

---
Doug Semler                       | doug@seaspace.com
SeaSpace Corporation              | Garbage In -- Gospel Out
Least Senior Software Developer;  | Minister of things to do Next Quarter
Low Man on the Totem Pole         | (but will Never Be Done) DNRC  O-
A closed mind is a terrible thing | Bus Error (passengers dumped)